Clean Export Tagging Class in Paragrah Style Options

Hello!

I try to clean the text box called Class in the Paragraph Style Options > Export Tagging:

I expect this result:

this is my code, but I can't not find the correct method here:

Adobe InDesign CS6 (8.0) Object Model JS: ParagraphStyle

 var myDoc = app.activeDocument;
ParaStyle_Reduce();
//alert("Process Completed...");
function ParaStyle_Reduce(){
var countAllParagraphStyles = myDoc.allParagraphStyles.length; //simple counter to indicate the progress on Javascript console
for(var a=0;a<myDoc.allParagraphStyles.length;a++){
try{
// MENU PARAGRAPH STYLE OPTION - Advance Character Formats
myDoc.allParagraphStyles.includeCSSDefinition = false;
myDoc.allParagraphStyles.exportSelection = false;
$.writeln("Progress: " + a + " of " + countAllParagraphStyles + " Styles");  //simple counter to indicate the progress on Javascript console
}catch(e){}
}
}

Thanks so much!